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The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Ozone. WHERE...Douglas, Teller, western Elbert, western El Paso and central Arapahoe Counties. Locations include, but are not limited to Castle Rock, Kiowa, Monument, Manitou Springs, and Woodland Park. WHEN...200 PM Tuesday April 21 to 1000 PM Tuesday April 21 IMPACTS...Ozone concentrations could reach the Unhealthy for Sensitive Groups category within the advisory area Tuesday afternoon and evening. Ozone levels will improve overnight Tuesday night. HEALTH INFORMATION...Public Health Recommendations: Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.
Nissequogue River
Last Updated: April 21, 2026
Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Nissequogue River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Nissequogue River, the highest being situated at an altitude of ft, the .
The Nissequogue River is a 22-mile-long river located on Long Island in New York.
15-Day Long Term Forecast
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Nissequogue River Near Smithtown Ny
USGS 01304000 |
31 cfs | 0.63 ft | -3.4 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Nissequogue River is an 8.3-mile (13.4 km) long river flowing from Smithtown, New York into the Long Island Sound.
Its average discharge of 42.2 cubic feet per second (1.19 m3/s) is the most of any of the freshwater rivers on Long Island.
The river, like all other freshwater rivers on the island, is totally derived from groundwater (not from lakes).
Its name is derived from one of the Algonquian-speaking Nissequaq tribe in the area.The river rises south of NY-454 just east of the Hauppaugue County Offices and flows into Blydenburgh Park Pond where other tributaries that come from East Hauppauge and Commack meet and are dammed at Blydenburgh Pond. The river continues in a northeasterly direction, picking up additional tributaries from the north in Caleb Smith Park in Smithtown (where special regulation trout fishing is available). It is dammed once more before becoming an estuary at NY-25 where it then flows to Kings Park, New York, entering Long Island Sound at Nissequogue River State Park. Since much of the river is an estuary canoeists travel in both directions based on the tides.
Fish found in the river include Striped Bass, Bluefish, Summer Flounder, Winter Flounder, Porgies, Eels, Brown, Rainbow and Brook Trout, Yellow Perch, Largemouth Bass, Alewives, Herring, Shad, etc.
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